Device for heating carburetors or the air fed to carburetors



June 13, 1933. M. J-B. BARBARQU 1,914,063

DEVICE FOR HEATING CARBURETORS OR THE AIR FED TO CARBURETORS Filed Oct. 24, 1931 3 Sheets-Sheet l [BAKE/1800 TO R',

/74 /i/ 1/6 Mari/1pm 7 l N V E N June 13, 1933. M. J-B. BARBAROU 1,914,063

DEVICE FOR HEATING CARBURETORS OR THE AIR FED TO CARBURETORS Filed Oct. 24, 1951 s Sheets-Sheet. 2

llllllllll l ||||1-|||||| June 13, 1933. M. J-B. BARBAROU 1,914,063

DEVICE FOR HEATING GARBURETORS OR THE AIR FED To CARBURETORS Filed on. 24, 1951 3 Sheets-Sheet 3 Mar/U5 \E'an-BQpf/Sfe 50 rb arou INVENTOR ATTORNEY.

Patented June 13, 1933 UNITED STATES PATENT orrlcr.

HABIUS JEAN -IBAP'I'ISTE BABBAROU, OF .NEUILLY-SUR-SEINE, FRANCE DEVICE NB, HEATING CARBURETORS OR THE AIR FED 1'0 GABBUBETOBS Application filed October 24, 1931, Serial K0. 570,803, and in France December 29, 1880.

be fed to the carburetor, in order to do away with the above stated drawbacks.

Many devices have already been proposed do to that effect, which utilize the action of either the circulation water, or the exhaust gases, or again the lubricating oil when it flows out from the engine.

The object of the present invention is a device for heating carburetors or the air fed to the carburetors by means of the lubricating oil, the main feature of that device being that it is adapted to be used as an oil sump, an 011 refrigerator, and an air heater.

According to a preferred embodiment of my invention, the device comprises in a single vessel two independent circuits, the first of which forms a sink and collects the oil brought to a certain temperature in the engine, when the latter is running, while the second one, formin a chamber wholly independent from the rst one, comprises a nest of tubes through which the air on its way to carburetor is caused to flow, while the oil flows between the tubes and heats them while being itself cooled.

A discharge pump, driven by the engine,

draws in the lubricant from the engine crankcase, discharges it into the nest of tubes, and

therefrom into the main tank, so as to complete the full circuit of circulation.

That device has the advantage to make use, as a source of heat, of the oil, and to cool it before its being again utilized in the engine,

.4 thus acting as an oil refrigerator, and an air heater. Another advantage consists in utilizing that devicealso as an oil sink, which collects the lubricant which has just been utilized in l the engine. Such an arrangement makes it possible to avoid an accumulation of oil in the e no crank-case, and an excessive consumption.

As the engine is intended to run at very 9 different temperatures (starting in cold engine provided with a device according to weather, engine at full speed), the device should operate whatever the viscosity may be. Variations of viscosity may produce temporary increases of pressure, which might I have very serious consequences for the dc- 5 vice, as the nest of tubes, which opposes a considerable resistance to the flow of the oil, might stop the circuit.

According to another characteristic of my invention, in order to obviate this drawback, 9? i a direct passage is disposed in parallel with the nest of tubes and forms a by-pass when the pressure of oil increases up to a given value.

Under normal conditions of operation, the L oil passes through the nest of tubes, but if the temperature is too low, the viscosity increases, the pressure consequently increases, and the by-pass is brought into operation.

A preferred embodiment of my invention will be hereinafterdescribed with reference to the accompanying drawings, given merely by way of example, and in which:

Fig. 1 is a longitudinaljsectionalview of a device according to my invention; 4

Fig. 2 is a sectional view, the left hand part of which corresponds to a section on the line 2-2 of Fig. 1, while the right hand part corresponds to a section on the line 2 of Fig. 1;

Fig. 3 is a horizontal section on the line 33 of Fig. 1.

Fig. 4 is a diagrammatical side view of an my invention.

In the embodiment shown in the drawings, the device comprises a sheet iron vessel 1 fixed, on the one hand to the casing 2 of the engine and on the other hand to the carburetor 3. In that vessel is provided a first chamber forming a sink. Said chamber comprises an upper space 4 connected through one or more conduits 4" with the bottom of crank-case 2, and through a vertical and central artition element 5 with a lower space 6. aid sink serves to collect the whole of the lubricating oil of the engine. Said oil is drawn in through a strainer 7 (Fig. 1) and a connection 8 by a pump 8".

Said pump discharges the oil thpough conof saidcoolingchamber withsaidhox, w valve interposed between said tube box, adapted to be opened when the premure in said cooling chamber reaches a predeter- 5 mined' value and means fornetuming the cooled oil from said box to the engine.

In testimony whereof I have signed my name to this ification.

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